Date: 5/11/06

Available from Mouser Electronics www.mouser.com (800) 346-6873

KT-400242Electrical Specifications:• Center frequency (f0): 40.0KHz ± 1.0KHz• Nominal impedance: 1,000Ω• Sound pressure level @ f0: 117dB• Sensitivity @ f0: -53dB (0dB = 1V/µ bar)• Echo sensitivity @ f0: -45dB (0dB re 50 bursts sine

wave of 20 volts peak-peak; 100cm reflection target)• Bandwidth -6dB: 2KHz• Ringing: 1.2mS (max.)• Beam angle -6dB: 55°• Capacitance @ 1KHz: 2,400pF ± 20%• Max. driving voltage: 20Vrms (cont.)

Part Number:

255-400PT16-ROX

Ultrasonic TransducerDimensions: mm (In.)

Ult

raso

nic

Tra

nsd

uce

r

Mechanical Specifications:• Operating temperature: -30°C ~ +85°C• Storage temperature: -40°C ~ +85°C

030

-30-24-18-12-60

60

90

120

150180

210

240

270

300

330

Sensitivity/Sound Pressure Level

Tested under 10Vrms @30cm

Impedance/Phase Angle vs. Frequency

Beam Angle: Tested at 40.0Khz frequency

Tested under 1Vrms Oscillation Level

35 36 37 38 39 40 41 42 43 44 45

35 36 37 38 39 40 41 42 43 44 45

-50

-55

-60

-65

-70

-75

-80

-85

-90

130

125

120

115

110

105

100

95

90

Frequency (khz)

Sen

sitiv

ity (

dB)

SP

L (d

B)

9075604530150-15-30-45-60-75-90

100000

ø13(ø.512)

12.19(.48)

ø16.20(ø.638)

10(.394)

ø1.19(ø.047)

10(.394)

Screen

10000

1000

100

Impe

danc

e (O

hm)

Pha

se A

ngle

(D

egre

e)

Frequency (Khz)

Notes:• RoHS Compliant by Exemption

Specifications are subject to change without notice. No liability or warranty implied by this information. Environmental compliance based on producer documentation.